The Sapha Dhammakaya is an assembly hall located just opposite to the Dhammakaya Cetiya. It was designed to be a multi-functional, two-storied building suitable for meditation, Dhamma lectures, religious activities, youth development training, and meeting venue for monks. The upper level was designed to accommodate 150,000 with the lower level used for parking. Once the number of attendants exceeds 150,000, the lower level can be converted to a gathering place for another 150,000 people. Parking is then moved to the surrounding open space.
Built in 2520 B.E. (1997) out of the necessity to find a roofed space for people attending temple activities, Sapha Dhammakaya covers an area of over 40 acres and is believed to be the largest assembly hall in the world.
Since 2513 B.E. (1970) when the temple was established, the number of followers has continuously grown from several hundreds to tens of thousands to a record high of more than 200,000 in the year 2543 B.E. (2000). The Hall has been used extensively until today.